| Name | CVE-2021-3682 |
| Description | A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2753-1, DLA-3099-1, DSA-4980-1, ELA-481-1 |
| Debian Bugs | 991911 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| qemu (PTS) | jessie, jessie (lts) | 1:2.1+dfsg-12+deb8u23 | fixed |
| stretch (security) | 1:2.8+dfsg-6+deb9u17 | fixed | |
| stretch (lts), stretch | 1:2.8+dfsg-6+deb9u19 | fixed | |
| buster (security), buster, buster (lts) | 1:3.1+dfsg-8+deb10u12 | fixed | |
| bullseye | 1:5.2+dfsg-11+deb11u3 | fixed | |
| bullseye (security) | 1:5.2+dfsg-11+deb11u2 | fixed | |
| bookworm | 1:7.2+dfsg-7+deb12u7 | fixed | |
| sid, trixie | 1:9.2.0+ds-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| qemu | source | jessie | 1:2.1+dfsg-12+deb8u21 | ELA-481-1 | ||
| qemu | source | stretch | 1:2.8+dfsg-6+deb9u15 | DLA-2753-1 | ||
| qemu | source | buster | 1:3.1+dfsg-8+deb10u9 | DLA-3099-1 | ||
| qemu | source | bullseye | 1:5.2+dfsg-11+deb11u1 | DSA-4980-1 | ||
| qemu | source | (unstable) | 1:6.0+dfsg-3 | 991911 |
https://gitlab.com/qemu-project/qemu/-/issues/491
Introduced by: https://gitlab.com/qemu-project/qemu/-/commit/b2d1fe67d09d2b6c7da647fbcea6ca0148c206d3 (v1.4.0-rc0)
Fixed by: https://gitlab.com/qemu-project/qemu/-/commit/5e796671e6b8d5de4b0b423dce1b3eba144a92c9 (v6.1.0-rc2)